Krassilnikoviae: A New Class of Micro-Organisms found in Sea and Ocean Depths

Abstract
A new class of micro-organisms, the KRASSILNIKOVIAE, found in the Black Sea, the Pacific and the Arctic Oceans, is described. These organisms developed on slides immersed in the waters; they have not been cultivated in the laboratory. They consist of non-branching, non-septate filaments with a head at one end consisting of a cluster of round bodies. The filaments often become interlaced and form strings which can just be seen by the naked eye. They may or may not be contained in a sheath. Comparisons are made between the Actinomycetes, Eubacteriae, Myxobacteriae, Spirochaetaceae, and the new class. The new class is believed by the authors to occupy an intermediate position between the protozoa and the bacteria.

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